purulence vs body fluid

purulence and body fluid both are nouns.

Word	Noun	Adjective	Verb	Adverb
purulence	Yes	No	No	No
body fluid	Yes	No	No	No

As nouns, body fluid is a hypernym of purulence; that is, body fluid is a word with a broader meaning than purulence:

Other hypernyms of purulence include bodily fluid, humor, humour, liquid body substance.

purulence (noun)	body fluid (noun)
a fluid product of inflammation	the liquid parts of the body
symptom of being purulent (containing or forming pus)